问题
单项选择题
(71) provides a data path between the CPU and external devices.
A．Keyboard
B．I/O port
C．Disk
D．Scanners
答案
参考答案：B
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(71) provides a data path between the CPU and external devices.
A．Keyboard
B．I/O port
C．Disk
D．Scanners
参考答案：B